Gate-valve.



No. 729,766." PATBNTED JUNE 2, 1903- S, JAGOBSEN.

GATE VALVE. APPLICATION FILED JAN. 10. 1902.

N0 MODEL.

.ments.

m rzavee.

UNITE STATES Patented June 2, 1903 i PATENT OFFICE.

GATE-VALVE.

' SZE'ECIFICATION forming part of Letters Patent No. 729,766, datedJ'une 2, 1903.

' Application filed January 1Q,'1902- $erial No. 89,154. (No model.)

To all whom/.7173 may concern;

Be it known that I, SORENSAUNE JAooB- SEN, a resident of Bellevue, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement-in Gate-Valves; and I do hereby declare the fol lowing to bea full, clear, and exact description thereof.

My inventionrelates to gate-valves of the type in which the disk is composed of tW0 SG1)* arate halves, and more particularly to such valves in which the disk-halves have bearingfaces engaging each other, so that they can adjust themselves to makea tight connection with the valve-seats. This type of valve usually is provided with ways or guides in the valve-casing and lugs or flanges on the disk-halves which engage therewith in order to guide the disk in its up and down move- Should the ways or flanges become worn, there is danger of the disk-halves falling apart or separating. to such an extent as to become disengaged from the stem or to otherwise bind orclogriu' the casing. The object of my invention is to overcome this difficulty and to provide means which will prevent the disk-halves from falling away from each other or separating to such an extent as to become disengaged from the valvestem or to otherwise bind or clog in the easing, even if the guideways and cooperating flanges or studs become worn excessively or be entirely absent. 1

To this end my invention comprises, generally stated, a gate-valve having its disk formed of two separate halves and means for holding said disk-halves from falling apart at their upper sides, together with interlocking means on the lower sides of said diskhalves to hold them from falling apart or separating unduly at the lower side.

Inthe accompanying drawings, Figure 1 is a longitudinal section through my improved valve and its casing. Fig. 2 is a transverse section of the same. i Fig. 3 is a bottom view of the disk-halves, and Fig. 4: is a similar view of a modification. V

The valve-casing 1 may be of any suitable shape and construction and is provided with the inlet and outlet ports 2 and 3. This casing opposite the inlet and outlet ports is provided with the valve-seats 4, said valve seats being shown as "separate brass rings secured tothe casing bysuitable screwthreaded joints, althoughthey may, if preferred, be formed integral with the casing. These valve-seats are preferably inclined toward each other, as shown,-so as-to form a wedge-shaped chamber therebetween, in which chamber the valve-disk is received. The valve-disk is shown as formed of two separate halves 5 and 6,having on their outer faces brass or other suitable rings 7, adapted to contact with the valve-seats at. Each of these disk-halves is preferably provided with an inwardly-projecting annular flange 8, said flanges being wider at the top of the disk than at the bottom, the diminution in width being a gradual one. The flange on one of the diskhalves is shown provided -with a beveled bearingface 9 and that on the other disk-half with a curved bearing-face 10, although both of these faces may be curved, if desired. When these two disk-halves are placed with the flanges S in engagement with each other, they will form a wedge-shaped disk corresponding to the wedge-shaped chamber between the inclined valve-seats e. The flanges 8 are preferably arranged to be practically opposite or in alinement with the valve-seats 4, so that said disk-halves cannot become dished or bent by the pressure.

The disk-halves are moved by an ordinary valve-stem 11, which-passes through a stuffing-box in the cover of the valve-casing and is provided outside of thecasing with a suitable operating hand-wheeL, The valve-stem 11 may either be securedto the disk and have its upper end provided with screw-threads, which are engaged by similar threads in the hub of the operating-wheel, or the said operating-wheel may be splined to the upper end of said valve-stem and the lower end of the latter be provided with screwthreads for engaging a suitable threadedsocket in or; at-

tached to the disk-halves. In the drawings we have shown thelatter arrangement; but it will be understood thatthe invention is not limited in this particular. By the rotation of the hand-wheel the disk-halves connected to the stem are elevated and lowered, thereby opening and closing the passage through the valve-casing. WVhen the valve is lowered, the disk-halves, by reason of their (.llVGd or inclined bearing-faces, can move upon each other and adjust themselves to the desired position so as to form tight connections with the valve-seats. Each of the diskhalves is provided on its sides with the projecting studs or flanges 12, and the valvecasing is provided with the inwardly-projecting ribs or flanges 13, which form between them a groove in which the projections or flanges 12 may move in the upward and downward movements of the valve, thereby guiding the latter and preventing the diskhalves from falling away from each other or separating to an undue extent.

The valve as thus far described is old and is practically the same as that covered by Letters Patent No. 565,239, granted to V. H. H. Sheets August 4:, 1896, and forms no part of my invention. My invention is an improvement on this and all other forms of gatevalves having a disk' composed of two separate halves, and is designed to prevent the undue separation of the disk-halves in case the cooperating guides 12 and 13 become excessively worn or are entirely absent.

The valve-stem 11 may be secured to the disk-halves in the manner shown in the above-named patent to Sheets, although I prefer to make this connection in a slightlymodified form. Each of the disk-halves 5 and (3 is shown provided with a socket or recess 14:, which sockets are engaged by lugs or projections 15 on the stem-section 16. This stem-section is hollow and provided with internal screw-threads 17 for receiving the screw-threaded lower end of the valvestem 11, by the rotation of which said diskhalves are raised and lowered. The flanges 8 are cut away at the lower side of the diskhalves, as at 18, to permit the said disk-halves to pass up over the lower end of the stem 11. This particular construction, however, is not necessary, as the valve-stem 11 may be secured to the stem-section 16 in any suitable manner and have its upper end screwthreaded and engaged by a suitable screwthreaded hand wheel or nut, as will be readily understood.

The lugs or projections 15 are preferably formed with rounded bearing-surfaces, as shown, so that they are, in effect, sections of spheres, and, if desired, the walls of the sockets or recesses 16 may also be curved or rounded, thereby permitting the disk halves to move freely on the stem to adjust themselves to the seats 4. Any other well-known means for connecting the stem to a disk composed of two separate halves may be used.

The means for preventing the disk-halves from separating or falling away from each other to an undue extent may take various forms, it being merely necessary that said means permit the disk-halves to move away from each other only to a limited extent, and preferably comprise cooperating locking means on the bottom sides of the disk-halves and means on the stem for engaging the upper sides of said disk-halves.

As a means for preventing the disks from falling away from each other at their upper sides I have shown a yoke'20, which is preferably separate from and secured to the stemsection 16as, forinstance, by threading the same thereon, as shown. This yoke 20 is provided with two oppositely-projecting arms having downturned ends 21, which lie outside of and engage the upper edges of the disk-halves 5 and 6 or projections 22 thereon.

At their lower sides I preferably provide the disk-halves with interlocking means for limiting the outward movement of said diskhalves. I11 Figs. 1, 2, and 3 these interlocking means are shown as studs 23"on one of the disk-halves and cooperating hooks 24 on the other disk-half. The studs 23 are shown as projecting from the flange 8 of the one disk-half, although this is not necessary, as they may be on the end of arms projecting from the side of said disk-halves and will then, in effect, be hooks, having their ends at right angles to the ends of the hooks 24.

In Fig. 1 the interlocking means comprise a single stud 25 on one of the disk-halves and anear 26 on the opposite disk-half, said car being provided with a suitable socket or opening which passes over the stud 25. When the valve-stem 11 is screw-threaded at its lower end to engage the screw-threaded socket of the hollow stem-section 16, it is essential that the form of interlocking means shown in Fig. 3 be used in order to permit the lower end of the stem passing down beyond the disk-halves; but in case an external screw-thread is usedthat is, a screw-thread on the upper end of the stem 11, whichstem 11 is then suitably secured to the stem-section 16then the form of interlocking means shown in Fig. 4: may be used.

Where the interlocking portions at the lower sides of the disk-halves are formed integral with said disk-halves, as shown, it is essential that the holding means at the upper sides of said disk-halves be made separate from the stem, as shown; otherwise the parts could not be assembled. As shown, however, the disk-halves are interlocked at their lower sides and then assembled with the stemsection 16, after which the yoke 20 can be screwed down to the position shown, and thus prevent the disk-halves from falling apart or separating to an undue extent.

The means shown both at the bottom and top for holding the disk-halves together permit a certain amount of movement between said disk-halves, so that they can move relatively to each other and seat themselves closely on the valve-seats 4; but said means do not permit sufficient movement of the diskhalves so that they can become disengaged from the valve-stem or otherwise bind or clog in the casing. Inasmuch as there is little or no wear between the holding means,

both at the top and bottom of the disk-halves, they will insure that the disk-halves do not become disengaged from the valve-stem or clog or bind in the valve-casing no matter to what extent the guides 12 and 13 may become worn. When the operating-thread is formed on the upper end of the valve-stem 11, it is not necessary that the stem-section 16 be of a separate piece from the stem 11, as it might in that case be formed integral therewith.

Neither is it essential that the lugs be on the stem-section and the socket 14in the diskhalves, as these parts may be reversed or be substantially such as shown in the patent to Sheets, above referred to, or they may be replaced by any well-known means for connecting the stem to a disk composed of two sepa rate halves. Neitheris the invention limited to disk-halves having bearing-faces engaging each other, but it is equally applicable to all gate-valves which have disks composed of two separate halves.

The feature of having a stem comprising two sections and of means both at the top and bottom of the disk-halves for preventing their undue separation are not claimed, broadly, in this application,but are claimed in my application, Serial No. 89,152, of even date herewith.

\Vhat I claim as my invention, and desire to secure by LettersPatent, is

1. A gate-valve having a disk composed of two separate halves, a reciprocating Valvestem, cooperating lugs and sockets on said stem and disk-halves, and cooperating studs and hook-sockets on said disk-halves at their lower sides for preventing them from separating to an undue extent.

2. A gate-valve comprising a disk composed of two separate halves having bearing-faces engaging one another, areciprocating valvestem comprising two sections, cooperating lugs and sockets on the inner stem-section and d1sk-halves, and a yoke removably attached to the inner stem-section and engaging the disk-halves at their upper sides to prevent them from falling apart or separating to an undue extent.

3. A gate-valve having a disk composed of two separate halves, a reciprocatingvalvestem comprising two sections, cooperating lugs and sockets on the inner stem-section and disk-halves, cooperating interlocking means on the inner stem-section and disk-halves at their upper sides to prevent the latter from falling apart, and interlocking means on said disk-halves at their lower sides for preventing them from separating to an undue extent.

at. A gate-valve comprising a disk composed of two separate halves, a reciprocating valvestem comprising two sections, cooperating lugs and sockets on the inner stemsection and disk-halves, means removably secured to the inner stem-section and adapted to engage the upper sides of the disk-halves and prevent them from falling apart, and cooperatinginterlocking means on said disk-halves at their lower sides for preventing them from separat- 

